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After yesterdays activities of attending Greater Bay Area Technology Seminar, networking luncheon, business matching meetings, Munjeong-dong Raemian Gallery and Ground X Corp visit, today the delegate continue Koreas agenda. At 10 to 11 A.M., the mission visit Doosan Robotics which is part of the Doosan Group and a major global player in the design, development and delivery of advanced collaborative robot systems and solutions to manufatures. It enables smart factories by developing and manufacturing cobots that are capable o...
Date：2019-07-12 [More+]
electronica China, lasting for three days, ringed down the curtain on Mar.22,2019 successfully. Microhm prepared elaborately and exhibited full range of resistors in the site. Customers from all over the world visited Microhm E5 - 5606, consulted resistors and experienced. Our staffs introductions of the features, applications and merits were brief and to the point. Customers not only stayed for a time in front of the reception to learn more about products, but also streamed into Microhms booth to have a close look of the mat...
Date：2019-03-25 [More+]
The fact that shunt resistors dissipate power as a result of the load current flowing through them requires that they have very low resistance values. Additionally, for measurement stability, current sense resistors should also have a very low temperature coefficient of resistance (TCR). A low TCR will result in high measurement accuracy with a low temperature dependency. The current sense resistors thermal EMF is another important characteristic. Current shunt resistors must operate over a wide range of currents. When the cu...
Date：2019-09-06 [More+]
IC designs and many high power resistors utilize heat sink to dissipate heat so as to keep reasonable temperature for normal operation and performance. A heat sink is an important but often overlooked component. Q: A simple but obvious question: what is used as the material for heat sinks? A: They are usually made of aluminum, but sometimes copper is used. While copper has better thermal conductivity than aluminum, it is heavier, more costly, and cannot be extruded. Aluminum has favorable thermal, fabrication, weight, and oth...
Date：2019-09-06 [More+]
While LEDs are mostly driven by current sources, there are also several applications where constant voltage drivers are used. In that case current limiting resistors are mandatory. But that raises the question which resistor is the right one to guarantee reliable and accurate control while not compromising efficiency. Not all resistors are the same and growth in markets like high-power LED lighting is serving to highlight the importance of understanding all aspects of an application in order to correctly and safely specify th...
Date：2019-09-06 [More+]
An ammeter is a device designed to accurately measure and display electrical current in a readable form, which could be a moving coil meter, a LED bargraph display or a digital panel meter. The basic unit of electrical current is Amperes, usually shortened to Amps. Milliamps, is a more convenient measurement for lower power circuits When designing an ammeter, external resistors, usually referred to as shunt resistors (or sometimes current resistors), are connected in parallel with the meter input to extend or convert the rang...
Date：2019-09-05 [More+]
The range and complexity of electrical equipment has increased dramatically in recent years. An unwanted consequence of this rise is the creation of harmonic currents, which can cause voltage distortion and quality problems. Also known as damping resistors, harmonic filters reduce distortions in power systems, which can be produced by nonlinear loads such as arc furnaces and switch-mode power supply (SMPS). Harmonics can have adverse effects on the power supply network. If the nonlinear loads produce unwanted harmonics, they ...
Date：2019-09-04 [More+]
There are a vast array of power supplies on the market, and the variety of resistor applications in those designs broaden the selection dramatically. Engineers from power supplier factorys often consult high voltage resistors, like HPMRY, PMRY, EE series, MPF series from Microhm Electronics. So, for the purpose of this article, power supplies will be referred to as devices that have fixed DC outputs up to several kV. Whatever the application, power supply designers must be aware of specific regulations on safety or the enviro...
Date：2019-09-04 [More+]
Resistors, as main passive components are widely used in all applications required electricity, including air conditioner. The heater blower motor reduces or increases the amount of air blowing through the dashboard vents based on the fan speed selected or, in an automatic climate control system, the interior temperature and other factors. But resistors, small electronic parts tucked out of sight, are what actually control the fan speed by reducing the amount of electrical current going to the blower motor. When everything is...
Date：2019-09-03 [More+]
Many suppliers (OEMs) were asked by the car manufacturers to build and certify their quality management system according to the rules and regulations of their own country organizations, such as: VDA (Germany), AIAG (North America), AVSQ (Italy), FIEV (France), SMMT (UK). But due to this regulation a supplier needed to provide two different certificates for Daimler and Chrysler (VDA 6.1 for Germany and QS 9000 America), even though the supplier delivered only to a single company. These complexities accelerated the need for har...
Date：2019-09-03 [More+]
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